<template>
  <div>
             <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary" @click="songRoles">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                  <!-- 渲染一级权限 -->
                  <el-col :span="5">
                    <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染二级和三级权限 -->
                  <el-col :span="19">
                    <!-- 通过for循环嵌套渲染二级权限 -->
                    <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                      <!-- 二级 -->
                      <el-col :span="6">
                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <!-- 三级 -->
                      <el-col :span="13">
                        <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable
                        @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                      </el-col>
                    </el-row>
                  </el-col>
                </el-row>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showRolesDialog(scope.row)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>

        </el-table>
        <!-- 修改角色的对话框 -->
         <el-dialog
          title="修改角色"
          :visible.sync="RolesDialogVisible"
          width="50%" @close="RolesDialogClosed">
         <el-form :model="Rolesbianji" :rules="RolesbianjiRules" ref="RolesbianjiRef" label-width="70px">
            <el-form-item label="角色ID">
              <el-input v-model="Rolesbianji.roleId" disabled></el-input>
            </el-form-item>
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="Rolesbianji.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
              <el-input v-model="Rolesbianji.roleDesc"></el-input>
            </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="RolesDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="rolesUserInfo">确 定</el-button>
          </span>
        </el-dialog>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox
      node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加角色的对话框 -->
       <el-dialog
          title="添加角色"
          :visible.sync="addDialogRoles"
          width="50%" >
          <!-- 内容主体区域 -->
           <el-form :model="addFormRoles" :rules="RolesbianjiRules" ref="rolesFormRef" label-width="70px">
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="addFormRoles.roleName"></el-input>
            </el-form-item>
             <el-form-item label="角色描述" prop="roleDesc">
              <el-input v-model="addFormRoles.roleDesc"></el-input>
            </el-form-item>
          </el-form>
          <!-- 底部区域 -->
          <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogRoles = false">取 消</el-button>
            <el-button type="primary" @click="songRolescc">确 定</el-button>
          </span>
        </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      //   控制修改角色的对话框显示与隐藏
      RolesDialogVisible: false,
      //   编辑用户信息的暂存区对象
      Rolesbianji: {},
      // 修改角色的验证规则
      RolesbianjiRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 16, message: '长度在 4 到 16 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 2, max: 25, message: '长度在 4 到 25 个字符', trigger: 'blur' }
        ]
      },
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中节点的id值
      defKeys: [],
      // 分配权限的角色id
      roleId: '',
      // 添加角色的对话框显示与隐藏
      addDialogRoles: false,
      // 添加角色表单保存区
      addFormRoles: {
        roleName: '',
        roleDesc: ''
      }
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    //  获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户列表失败')
      }
      this.rolelist = res.data
      // console.log(this.rolelist)
    },
    // 展示编辑角色的对话框
    async showRolesDialog (row) {
    //   console.log(row)
      // eslint-disable-next-line no-undef
      const { data: res } = await this.$http.get('roles/' + row.id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败')
      }
      this.Rolesbianji = res.data
      // console.log(this.Rolesbianji)
      this.RolesDialogVisible = true
    },
    // 监听修改角色的对话框关闭事件并重置错误提示
    RolesDialogClosed () {
      this.$refs.RolesbianjiRef.resetFields()
    },
    // 修改角色信息并提交
    rolesUserInfo () {
      this.$refs.RolesbianjiRef.validate(async valid => {
        if (!valid) return
        // 发起修改角色信息的数据请求
        const { data: res } = await this.$http.put('roles/' + parseInt(this.Rolesbianji.roleId), { roleName: this.Rolesbianji.roleName, roleDesc: this.Rolesbianji.roleDesc })
        // console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败!')
        }
        // 关闭对话框
        this.RolesDialogVisible = false
        // 刷新列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新用户信息成功!')
      })
    },
    // 根据Id删除对应的角色
    async removeRolesById (id) {
    //   console.log(id)
    // 弹框询问是否删除
      const confirmRoles = await this.$confirm('此操作将永久删除该角色,是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      //   console.log(confirmRoles)
      if (confirmRoles !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败!')
      }
      this.$message.success('删除用户成功!')
      // 刷新用户列表
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色,是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      // this.getRolesList()
      role.children = res.data
    },
    // 展示权限的对话框
    async showSetRightDialog (role) {
      // 获取角色id保存起来共使用
      this.roleId = role.id
      // 获取所有的权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式 获取角色下所有三级权限的id,并保存到defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      // 刷新列表
      this.getRolesList()
      // 隐藏对话框
      this.setRightDialogVisible = false
    },
    // 点击显示添加角色的对话框
    songRoles () {
      this.addDialogRoles = true
    },
    // 点击按钮添加新角色
    async songRolescc () {
      this.$refs.rolesFormRef.validate(async valid => {
        // eslint-disable-next-line no-useless-return
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addFormRoles)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败!')
        }
        this.$message.success('添加角色成功!')
        // 隐藏添加用户的对话框
        this.addDialogRoles = false
        // 刷新列表
        this.getRolesList()
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
